Which is why I try to get my sausage from butchers I know use non-gross meat.

If you cannot tell, it's not gross anymore. The grossness only exists in your brain. It's not embedded in the proteins. As you quoted, there's nothing wrong with the meat (it's just that we have grown unaccustomed to eating it).

It's a relatively new luxury and a signal of our wealth that we can afford to not eat some edible parts of the animals we slaughter. Imagine that 200 years ago. I think it's great if you can process those parts into tasty stuff, as long as you don't need to add too many potentially harmful chemicals along the way.